Definition of prairie bean in English:

prairie bean

noun

  • 1The seed of the bean Phaseolus metcalfei, native to the south-western U.S. and grown for fodder; the plant itself.

  • 2A plant of the genus Thermopsis (family Fabaceae (Leguminosae)).

Origin

Early 19th century; earliest use found in Meriwether Lewis (1774–1809).